How to improve Fuel Efficiency (E89 20i)

[Smartbear]

Colder air more power, so use less throttle. And drive on days when the air pressure is high.
Fuel efficient tyres tend to be harder and noisy.

I drove home tonight using the triangle, got 36 mpg. Never went above 45mph.
I thought the later engines had more torque, surely you won't get that without burning more fuel.
And on turbo does air temp. and pressure make any difference.
Good car to have in Austria i suppose.

It’s been achieved before, the n52 engine in your car makes more torque than the m54 that preceded it yet uses less fuel
All engines take longer to get to normal operating temps in cold weather & need a richer air/fuel mixture while they’re doing this, driving average mpg down.
Turbo cars will make more power on cold days just like normally aspirated engines, bigger intercoolers help them make more power by reducing intake temps.
Rob

 

[Silverstar]

I think you’re missing the point of the op, there’s nothing wrong with wanting a more fuel efficient car & the 2litre turbo’s are more fuel efficient than the older 6pot models, the additional savings on tax & servicing are just icing on the cake.
To argue that the savings are only small ones is just dancing around on a pinhead, they all contribute to the op’s wish for the most efficient model of z4 he can buy.

On the contrary I perfectly well understand what the OP is asking and the answer to that as many have responded is not to spend bucks on mods that might improve economy but instead to concentrate on driving style and perhaps tyres. This applies to any engine in the range. Since this is a discussion I am merely pointing out the fact that it does not make a huge difference to the running costs between the 18i 20i 28i 23i or 30i they will all be pretty much similar in the real world and the actual monetary savings unless you are doing high mileage is paltry. Perhaps the OP has not thought of it that way or maybe he has and he is one that does do high mileages but either way maybe this might give him another view point to think about. But you as in many of your other posts like to make out that the difference in running costs between these engines is like that of running a diesel fiesta and a M3 which clearly isn't so.

 

[Smartbear]

I think you’re missing the point of the op, there’s nothing wrong with wanting a more fuel efficient car & the 2litre turbo’s are more fuel efficient than the older 6pot models, the additional savings on tax & servicing are just icing on the cake.
To argue that the savings are only small ones is just dancing around on a pinhead, they all contribute to the op’s wish for the most efficient model of z4 he can buy.

On the contrary I perfectly well understand what the OP is asking and the answer to that as many have responded is not to spend bucks on mods that might improve economy but instead to concentrate on driving style and perhaps tyres. This applies to any engine in the range. Since this is a discussion I am merely pointing out the fact that it does not make a huge difference to the running costs between the 18i 20i 28i 23i or 30i they will all be pretty much similar in the real world and the actual monetary savings unless you are doing high mileage is paltry. Perhaps the OP has not thought of it that way and maybe this might give him another view point to think about. But you as in many of your other posts like to make out that the difference in running costs between these engines is like that of running a diesel fiesta and a M3.

I think you’re letting your imagination run wild here, I’ve never said any such thing.
On the contrary it seems that you like to pretend that the modern replacement for your model isn’t more economical despite Bmw themselves publishing figures that contradict your opinion.
The op originally asked which is the most fuel efficient Bmw & he’s been correctly informed that it’s the n20 range.
To constantly argue against this defies all the facts.
Rob

 

[Silverstar]

I think you’re missing the point of the op, there’s nothing wrong with wanting a more fuel efficient car & the 2litre turbo’s are more fuel efficient than the older 6pot models, the additional savings on tax & servicing are just icing on the cake.
To argue that the savings are only small ones is just dancing around on a pinhead, they all contribute to the op’s wish for the most efficient model of z4 he can buy.

On the contrary I perfectly well understand what the OP is asking and the answer to that as many have responded is not to spend bucks on mods that might improve economy but instead to concentrate on driving style and perhaps tyres. This applies to any engine in the range. Since this is a discussion I am merely pointing out the fact that it does not make a huge difference to the running costs between the 18i 20i 28i 23i or 30i they will all be pretty much similar in the real world and the actual monetary savings unless you are doing high mileage is paltry. Perhaps the OP has not thought of it that way and maybe this might give him another view point to think about. But you as in many of your other posts like to make out that the difference in running costs between these engines is like that of running a diesel fiesta and a M3.

I think you’re letting your imagination run wild here, I’ve never said any such thing.
On the contrary it seems that you like to pretend that the modern replacement for your model isn’t more economical despite Bmw themselves publishing figures that contradict your opinion.
The op originally asked which is the most fuel efficient Bmw & he’s been correctly informed that it’s the n20 range.
To constantly argue against this defies all the facts.
Rob

Never once have I stated the the 4 pots are less economical or that the 6 pots are more economical. I just pointed out that in the real world with lower miles the monetary difference isn't great! Published figures by manufacturers are more often then not bull! My original post clearly said that the running cost between all 4 pots and NA 6 pots will be similar but you came along and tried to point out things like tax and servicing being way way higher on the 6 pots which as I indicated in my reply to you, simply isn't the case.

 

[Smartbear]

On the contrary I perfectly well understand what the OP is asking and the answer to that as many have responded is not to spend bucks on mods that might improve economy but instead to concentrate on driving style and perhaps tyres. This applies to any engine in the range. Since this is a discussion I am merely pointing out the fact that it does not make a huge difference to the running costs between the 18i 20i 28i 23i or 30i they will all be pretty much similar in the real world and the actual monetary savings unless you are doing high mileage is paltry. Perhaps the OP has not thought of it that way and maybe this might give him another view point to think about. But you as in many of your other posts like to make out that the difference in running costs between these engines is like that of running a diesel fiesta and a M3.

I think you’re letting your imagination run wild here, I’ve never said any such thing.
On the contrary it seems that you like to pretend that the modern replacement for your model isn’t more economical despite Bmw themselves publishing figures that contradict your opinion.
The op originally asked which is the most fuel efficient Bmw & he’s been correctly informed that it’s the n20 range.
To constantly argue against this defies all the facts.
Rob

Never once have I stated the the 4 pots are less economical or that the 6 pots are more economical. I just pointed out that in the real world with lower miles the monetary difference isn't great! Published figures by manufacturers are more often then not bull! My original post clearly said that the running cost between all 4 pots and NA 6 pots will be similar but you came along and tried to point out things like tax and servicing being way way higher on the 6 pots which as I indicated in my reply to you, simply isn't the case.

You’re doing it again, i never said that. What i actually said was that the n20 range is cheaper to tax & service which is 100% true. You’re just exaggerating everything i say for some reason? :?
Rob

 

[Silverstar]

I think you’re letting your imagination run wild here, I’ve never said any such thing.
On the contrary it seems that you like to pretend that the modern replacement for your model isn’t more economical despite Bmw themselves publishing figures that contradict your opinion.
The op originally asked which is the most fuel efficient Bmw & he’s been correctly informed that it’s the n20 range.
To constantly argue against this defies all the facts.
Rob

Never once have I stated the the 4 pots are less economical or that the 6 pots are more economical. I just pointed out that in the real world with lower miles the monetary difference isn't great! Published figures by manufacturers are more often then not bull! My original post clearly said that the running cost between all 4 pots and NA 6 pots will be similar but you came along and tried to point out things like tax and servicing being way way higher on the 6 pots which as I indicated in my reply to you, simply isn't the case.

You’re doing it again, i never said that. What i actually said was that the n20 range is cheaper to tax & service which is 100% true. You’re just exaggerating everything i say for some reason? :?
Rob

That is what you said agreed, but you make out or it can read to others, that you are implying the difference in costs is huge to which I replied to you indicating that the difference isn't so big. Anyway we are going around in circles so let's agree to disagree!

 

[enuff_zed]

Dear [ref]flow150595[/ref],
The first page answers all you need to know. :wink:

 

[Smartbear]

Never once have I stated the the 4 pots are less economical or that the 6 pots are more economical. I just pointed out that in the real world with lower miles the monetary difference isn't great! Published figures by manufacturers are more often then not bull! My original post clearly said that the running cost between all 4 pots and NA 6 pots will be similar but you came along and tried to point out things like tax and servicing being way way higher on the 6 pots which as I indicated in my reply to you, simply isn't the case.

You’re doing it again, i never said that. What i actually said was that the n20 range is cheaper to tax & service which is 100% true. You’re just exaggerating everything i say for some reason? :?
Rob

That is what you said agreed, but you make out or it can read to others, that you are implying the difference in costs is huge to which I replied to you indicating that the difference isn't so big. Anyway we are going around in circles so let's agree to disagree!

I’ve never implied the cost differential is huge as you put it, that’s entirely in your head, let’s leave it there.
Rob

 

[Silverstar]

You’re doing it again, i never said that. What i actually said was that the n20 range is cheaper to tax & service which is 100% true. You’re just exaggerating everything i say for some reason? :?
Rob

That is what you said agreed, but you make out or it can read to others, that you are implying the difference in costs is huge to which I replied to you indicating that the difference isn't so big. Anyway we are going around in circles so let's agree to disagree!

I’ve never implied the cost differential is huge as you put it, that’s entirely in your head, let’s leave it there.
Rob

Not in my head Rob, it's how it can be perceived to others like I said agree to disagree!

 

[Smartbear]

That is what you said agreed, but you make out or it can read to others, that you are implying the difference in costs is huge to which I replied to you indicating that the difference isn't so big. Anyway we are going around in circles so let's agree to disagree!

I’ve never implied the cost differential is huge as you put it, that’s entirely in your head, let’s leave it there.
Rob

Not in my head Rob, it's how it can be perceived to others like I said agree to disagree!

Well the “others” seem to be quiet so it looks like it’s only you! As I said, let’s leave it there.
Rob

 

[Silverstar]

I’ve never implied the cost differential is huge as you put it, that’s entirely in your head, let’s leave it there.
Rob

Not in my head Rob, it's how it can be perceived to others like I said agree to disagree!

Well the “others” seem to be quiet so it looks like it’s only you! As I said, let’s leave it there.
Rob

What's the matter Rob can't leave it alone? Can you blame them for staying quiet? How many times must I say agree to disagree?

 

[Smartbear]

Lol, I’ll let you have the last word :wink:
Rob

 

[Silverstar]

Lol, I’ll let you have the last word :wink:
Rob

So that's your game is it?

 

[Smartbear]

Lol, I’ll let you have the last word :wink:
Rob

So that's your game is it?

We could be here all day!
Rob

 

[enuff_zed]

Zyzzyva.

There you go, solved your problem gents. That's the last word..................in the Oxford English dictionary at any rate.
It's a tropical weevil.

 

[Chippie]

Zyzzyva.

There you go, solved your problem gents. That's the last word..................in the Oxford English dictionary at any rate.
It's a tropical weevil.

Every day’s a school day

 

[Argyll Andy]

Zyzzyva.

There you go, solved your problem gents. That's the last word..................in the Oxford English dictionary at any rate.
It's a tropical weevil.

Every day’s a school day

You trying to get the last word Chippie

 

[Chippie]

Zyzzyva.

There you go, solved your problem gents. That's the last word..................in the Oxford English dictionary at any rate.
It's a tropical weevil.

Every day’s a school day

You trying to get the last word Chippie

Oh no I’ll leave that to flow150595

 

[Z4M-2006]

Why is it madness...? OP has said he wants an E89, he loves the styling. What he’s asking is how to be as efficient as possible WITH an E89, NOT what is a more efficient car to drive. Before making your condescending little quips that you’re getting rather good at in terms of frequency, perhaps understand what is being asked.

Its madness because there are concerns around the expense/use of the very thing that makes it useful, unless its just an ornament that's being sought? Why buy a car like this if you will have to worry about whether or not you can use the thing?
You misunderstand, I am not being condescending I am trying to point out that if someone is in a position where they are worrying about the financial cost of fuel then buying something like a Z4 really isnt sensible. Or is your argument that should we be encouraging people to make large purchases of vehicles they love but that will cause them to struggle financially and as such be unable to actually enjoy?

If I have the wrong end of the stick here and what we actually have is someone who wants to use as little fuel as possible for environmental reasons but they are buying a BMW sports car then I will happily STFU :idunno:

Z4 2.0

BMW Sports car...

Your argument faultered right there... It isnt a sports car...


The OP would be able to do whatever he wants,its his money he can spend it how he wants.

I have had all kinds of cars,loads of V8's,V10 500 BHP+ motors,and im still interested in what the car can do on a run if need be.

Buying a car without having all the relevant facts is the daft idea.

 

[Nanu]

Why fuel efficiency in a Zed ??? :evil: